Do E-cigarettes have harmful additives like formaldehyde?

According to rumors, a Japanese study found that electronic cigarettes contain far more cancer-causing ingredients found in tobacco products. ... Some carbonyls, such as formaldehyde, acetaldehyde, and acrolein in e-cigarette emissions have also been reported in other countries [32,33,34]. read more

[2] E-cigarettes around 95% less harmful than tobacco estimates landmark review “E-cigarettes are not completely risk free but when compared to smoking, evidence shows they carry just a fraction of the harm. The problem is people increasingly think they are at least as harmful and this may be keeping millions of smokers from quitting. read more

Formaldehyde has been detected in e-cig vapor (more on that soon), and it appears that the propylene glycol is a major source of it. This is nicely explained (in detail) in response to a question on Stack Exchange, but the short version is that PG can degrade into formaldehyde as part of an incomplete combustion reaction. read more

Some e-cigarettes are made to look like traditional cigarettes. Other devices such as tank systems do not look like cigarettes. E-cigarettes do not burn tobacco. Instead, they have cartridges filled with nicotine and other chemicals. The liquid chemicals turn into a vapor or steam that a person inhales. E-cigarettes may contain harmful substances. read more